Dynamo-electric machine



(No Model.)

0. E. BALL.

DYNAMO ELECTRIC MACHINE.

No. 278,076. Patented May 22,1883.

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v ing located and adapted to be rotated in the UNITED STATES PATENTOFFICE.

CHARLES E. BALL, or PHILADELPHIA, PENNSYLVANIA.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 278,076, dated May 22,1883.

I Application filedFehruary 20, 1883. (No model.)

To all whom it may concern Be it known that I, CHARLES E. BALL, acitizen of the United States, residing at Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented certain new anduseful Improvements in Dynamo- ElectricMachines; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use it, reference being had to the accompanyingdrawing, which forms part of this specification, in which the figure isaside elevation.

My invention has reference to that class of dynamo-electric machines inwhich the armature revolves within the field or influence of but onemagnetic pole, the first of which was the machine shown and claimed inthe Letters Patentof theUnited States granted to me, dated June 20,1882,No. 259,791. My improvements thereon have for their object to provide aconstruction whereby three or more armatures may be employed, each ofsaid armatures beinductive field of only one pole of a magnet, and saidarmatures being so constructed and arranged that they may be coupled forintensity or for quantity.

My improvements consist in the combination, in a dynamo-electricmachine, of three or more armatures onthe same shaft, each of saidarmatures being located in the inductive field of only one pole of amagnet, there being one magnetic pole for each such armature.

' Myimprovements further consist in certain details of construction andcombination, hereinafter fully described.

Referring to the accompanying drawing, A indicates the base of adynamo-electric machine, said base being a casting in which are fastenedthree upright wrought-iron bars, B B 13 These are the magnet-bars, andthey are wound with insulated wire I) in such a manner as to producethree magnetic poles, two of which are alike in sign-that is,two of thepoles are N. and one S., or two may be S. and one N. The pole-pieces ofthe magnets are designated by the letters I) 11 b At each end of thecasting are standards A A formin g bracket-supports for thearmature-shaft U,

which has its bearings thereon. There are three armatures, D D D whichare fast on the shaft 0, and these are so arranged that each of them isin the-inductive field of one of the magnet-poles. Said armatures are ofthe class known as ring-armatnrcs, and they are coupled together, asshown, the ends of the bobbins of the first armature, D, being connectedby the wires 01 with the bobbins of the second armature, D, and thebobbins of said second armature, D, being connected to the bobbins ofthe third armature, D by the Wires (1. The coupling may be forintensity, in

which case the wires cl will be connected to the bobbins of the armatureD in such manner that the current from armature D will flow througharmature D, and the wires (1 will be connected to the bobbins of thearmature D so that the combined currents from armature'D will flowthrough said armature D or the armatures may be coupled for quantity byleading the wires cl d around the armatures -D D connecting with theends of i the bobbins of said last-named armatures. From the armature Dthe circuit is by the usual connection-wires d and commutator to theupper brush, e, of the commutator or collector E, thence to the externalcircuit and field-magnets, thence to the lower brush, e, thence to thearmature 1), back through armatures D I), successively, and thenceonward, as before.

The number of armatures employed may be increased to any desired extent,so that my invention includes a series of 'three or more armatures onthe same shaft and with the connections substantially as described.

What I claim as my invention is as follows:

1. The combination, in a dynamo-electric machine, of three or morearmatnres on the same shaft, each of said armatures being located andadapted to be rotated in the inductive field of only one pole of amagnet, said armatures being constructed to allow of their beingconnected directly together, substantially as shown and described.

2. The combination, in a dynamo-electric machine, of three armatures,each of which is located and adapted to be rotated in the inductivefield of only a single magnet-pole, two of the poles being alike, andthe remaining ICO pole unlike the others, substantially as shown anddescribed.

3. The combination, in a dynamo-electric machine, of three armatureslocated and adapted to be rotated in the inductive fields of differentpoles, there being only one pole for each armature, and all of thepole-pieces being on the same side of the machine, substantially asshown.

In testimony that I claim the foregoing I 10 have hereunto set my handthis 17th day of February, 1883.

CHAS. E. BALL.

Witnesses:

ROBERT J. OWEN, M. D. OoNNoLLY.

